Semi-weekly interior journal. [volume] (Stanford, Ky.) 1881-1905, 1887-12-02
SLIPS OF SCIENCE.


A PROCESS called the Azalinc process, BY
which oil paintings are photographed with
the color retained, il a late invention
TnE reason given by physicians for the
immunity FROM death of drl!nicn persons
who sustain severe fall, or injuries is, that
the nerve centcrs which reg ilatc the heart
and vessels are 50 much para wed in the
drunken man as not 10 be all 'c'ed by the
shock Of the fall. which In a sober man
would have acted ON them ~ violently a. To
stop the heart, arrest the circulation and
cause instant death
WnITR is usually defined as A comblna.
ton Of all coors, and black Is the absence
OF color Speaking accurately, AN object ia
white when II throws back all the rays of
hight, and black when II ab-orbs all 4 blue
object absnrbs all rays except the blue,
which II reflects, red object reflects the
I'll rays only, and 50 on through all tho
culors and their combinations
or the three leading anrsthctlcs chloro-
form, ether and nitrous oxide chloroform
il the most dangerous, the proportion Of
deaths 10 administrations Is | in Ol.uD
Ether comes next with | In 5000, while
nitrous OXIDE is last with | In l4O.UD But
II unfortunately happens that nitrous oxide
n Too volatile and can not be- used for oper.
atoms laalng more than one minute 80 that
ether must be- used
CARBoNs for use IN electric lights are
made from the residua of petroleum distilla-
ton, a. well IA from the car1nnaccous De.
poslts found around natural gas wells The
ma'crials are finely pulvcri1rd mixed with
~ little pitch and placed IN molds. which arc
packed IN boxes and put into furnace,
where they are submitted To an intense
heat The capacity of an ordinary furnace
IL 5000 crlyonS. They are baked for i've
days, and the cooling takes twcnty-four
hours
Nrw compound for stcoi consists OF
resin, llns"od oil, giyc"riue. and powdered
charcoal, heated and intimately mixed. in cor
tam definite proportions. II Is used by heat
ing the steel 10 a clear red heat, immcrsiug
ahd coating II IA the compound, the steel
beng aitcrwsrd rcheat"d aud hardened In
the usual manner by quickly cooling H. By
tins treatment, burned cast steel J., restored
10 its original condition. and the softer
grades of steel acquire the proportions VI
east steel
II has been a~ccrta.ucd that the dIficul-
ties experienced by acrpnaut-, due ~ the
rar"factinu 81 the atmp,p hcrc. begin only
at AN altitude Of twcuty-thrcc thousand or
twenty four thousand feet This view seems
supported 10y the fact that IN the Himaayas
and the Andes heights OF about twenty
thousand feet have been on several occa-
sions reached without any inconvenience
In such cases, however the ascent has al
ways been gradual The m effects expe-
r"nccd In balloons are possibly due 10 tho
sudicnnoss ~ the change
lr - stated that the process OF photograph
ing on boNwpod, heretofore thought imprac.
tiCahe, has been invented In Russia The
first step II to Ill its press with insolub.c
carbonate Of copper by means Of two sep
arat" solutions, IN which 1t is boiled suf-
hcicntly. polish Is then impaired 20 its
surface, asphalt IN solution - then applied
20 its back and sides. and finally scnsi-
tiZed gclatlne, film placed over the polished
face. The subject To be etched - now pho.
graphed on tho surface, and by washing the
soluble and unrintei parts Of the gelatins
removed 4 coating OF asphalt IL next APP
piled 20 the raised parts, the block stepped
IN nitric aid Of suitable strength (the
stronger the BETTER, where 1t remains one
hour, when II is removed and subjected to
the action Of sulphuric acid for the same
time The portions unprotected ara thus
changed "a nitrO-ccllulose. which. by brush
ing, is readily removed in the form OF
greenish powder To complete the process
the block Is dried and briskly brushed with
a stin brush. The asphalt il lastly removed
with bcnzlnc, and the block is ready for tho
press